French Tastevin Wine Taster, Crowned I and Crayfish, 18th C?

[amw]

My elderly friend inherited her grandmother’s silver, and the boxes contained some great stuff, including these several wine tasters, or tastevin, but I am challenged by the French Marks. They seem to be 18th century, if I am reading Tardy right. We have one like this, and another four with a crowned A (see other post).
Here is a crowned I; a crowned B dot L over G; and a crayfish? Are they 1760s? Is the crowned I, a date mark or a town mark? Thanks so much for any help, I’ve been puzzling for months.

[jgl]

I do read the letters F L G. Don't you ?
Could it be ?
François-Louis Galtignez,
Orfèvrerie : "la cuillère à café",
reçu le 11 frimaire An V (1er février 1796) comportaient déja un bonnet,
ré-insculpé en 1798,
Adresse de l'atelier :1) 12 rue Baillet ; 2) 88 rue Saint Germain-l'Auxerrois (1811),
N° préfecture :180, N° de garantie : 71,
Symbole : un bonnet de la liberté (et une rosette) ?

[swisssilver]

crowned I could be Paris, 1725
last mark, ( the sun) décharge 1722 to 1726, Paris
the mark in the middel can be the maker mark
not sure at all,
their isn't the 4° mark
after 1697 french silver sould be have 4 marks
1° makers mark
2° poinçons de charge
3° poinçons de décharge
4° garantie mark